There have been child warriors ever since adults figured out they were cheap, expendable, and made good human shields. With modern weaponry, a four-year-old with an AK-47 is a deadly tool. In the Congo, children are recruited, kidnapped, and forced to serve as soldiers, sex slaves, and cannon fodder. Here is a short passage on the subject from Heart of Diamonds.
Please consider a small donation to help the victims of rape, terror, and violence in the Congo. Women for Women International is one organization doing great work. Anything you can send them will be appreciated and will do a world of good for some people who really need it.